In spite of claims to the contrary, no provider including Verison will work everywhere. That is why it is important to know where the service provider works and where your phone will be used.

I disabled cortina and use a different browser, It eliminates the ads and edge communicating with the mother ship.

It would depend on where you are. Service will vary with location. My provider (ATT) works where I am, but a few miles away it does not. Verison on the other hand works in some of those areas. On a visit to Maine, with a group, only my ATT phone had service, while none of the others carried by members of our group did. In one town I found my phone useable if I moved about a city block, with no service la block away. There is an even greater problem if you want to rely on 5G. Many services have favorable rates, but the coverage is not uniform. I am located 90 miles NW of New York City. The mountains nearby may have a lot to do with the signal reliability. But I should point out that when I am near the shore of the Hudson River, 60 miles north of NYC. I can't pick up a signal till I am very close to NYC. At that point, the signal I pick up is from New Jersey. Consider where you are using the phone, and talk to others using it in the same area if you can. If you travel, keep in mind that there will be dead spots. The last thing you want is to find that there is a dead spot, wherever you are most likely to use your phone.

There can be some variation in postage rates depending on which post office worker looks at the mail. Recently we wanted to send a small padded envelope and while I stopped at my local post office a friend who was in the car tried to mail her parcel. The rate was higher than it should have been and in her mind too high, she took it to the post office she would normally use, and for the same item, mailed differently the postage dropped by $7.00. The knowlege of the postal worker can have a lot to do with what things cost.

A motor home doesn't work for everyone. I know a few who have tried it and then gave it up after a short time. You might want to rent one for a few weeks before you sell your house.

Try defragging the drive. It isn't a permanent solution but it may buy a bit of time. In general, you can not more programs.

I would use a felt tip marker on the back, be sure to have the photo on a hard surface when you write on it. I find that signing it in pencil on the mat increases the saleability. With original art (not photographs) I sign the image.

I rarely manage to get a decent shot of birds in flight if I am shooting the way I do when taking a static shot. I get some very decent shots shooting bursts in action mode.

Do you have to send the photo or just the image? I often have to transmit advertising layouts that include multiple photographs, which have to be approved by my client or printed. I send them as PDF files.

Before investing in new gear consider a harness stabilizer. BH photo has one for under $40. https://www.bhphotovideo.com/c/product/880364-REG/Keyhole_bc_khbl_Hands_Free_Camera_Harness_Black.html/overview

Instead of going to Amazon, put RF 100-500L into your search engine.

I picked up a small heavy duty, table top tripod from wish, or groupon. I don't recall which one. Go on to their site and type Tripod in the search box and see if anything interests you.

No problems that I know of. I have never used it on a crop body. Most of my glass was originally used on film cameras. 18-400mm does everything, but it doesn't to anything particularly well. If it helps think of it as the German Shepard of a lens. There are those better at one thing, but none as versatile in doing it all, Since I frequently travel through the Far East, Central and South America and am in situations where changing a lens or carrying extra weight is impractical. the lens is perfect for me, while some of my friends insist that an 8o mm prime is ideal have a 300 mm lens that is the size of a rocket launcher or carry a suit case full of glass.

Here is a cheap and dirty. Try a bottle top camera mount. I have frequently been in rough terrain that limited my ability to carry a tripod, but I did need to carry water. You can fill the bottle with water, sand or gravel. The larger the bottle and heavier what you put in it, the more it will support. These mounts cost about $10, and easily fit into your pocket. I have also used it with a tripod head.

I am a Sony fan. The cameras just seem to feel better in my hand and I like the image stabilization. While I have a lot of Sony/Minolta glass, my go to camera at the moment is a Sony 711 with a Tammorn 18-400 lens that was made for Cannon. If you decide to go or a Sony simply get a mount adopter so you can still use your Canon glass. I picked up one from BH for $200. If you don't need to maintain the electronic functions you can find mount adopters for about $30.