Amateur. Canon T7i. Usually jpg, sometimes raw & jpg. Besides cropping for composition, I generally crop all my keepers at a 6"x4" size with PSE when processing. am i doing my images an 'injustice' to crop to that size versus a larger size, or does it not matter. I'm sure i picked that way back due to the size i would print out pictures at home. I do very little home printing nowadays, so if cropping, is there a better size? Most of my work gets put on electronic picture frames, emailed to family, or ends up online. I do some canvas printing, usually 16x20, but probably had already cut it to 6x4 when PSE processing originally. Thanks.

Just say'n, Lee it is WAY easier in LR using the merge function and several exposures. Now, full disclosure here, but I hate just about everything about Photoshop. BUT, I have done this work several ways digital and film, with my own Broker's Commissions on the line.

You're killing yourself in PP when you can capture the exposures you need on site, adjust them to suit and then blend them "automagically" in LR. Probably a facility for that in PS, too! After that, for a wide representation, you can stitch several of 'em together just as ONE STEP easily.

Good Luck, Lee. Real Estate Photography is indeed demanding.
C

You're doing way too much work. Set the camera on a tripod and compose the shot first. Set the camera to Manual mode. Set the ISO to 320. Set the aperture to 7.1. Use matrix metering. Take your first shot for ambient light. You want to be over exposed by a couple of stops. Do this by adjusting your shutter speed. The histogram should be to the right middle. The next shot adjust your shutter down (faster shutter) a couple of clicks. Hold your speed light above your head at about 1/2 power. This depends on ceiling height. Take the shot. Next shot adjust your shutter to expose for the window. Aim your speed light at the window at about a 45° angle at about 1/4 power. Take the shot. Edit the photos in PS with your flash layer at the bottom. Ambient layer above that one. Layer mask hide all. Paint in some ambient light. Window pull above the ambient layer. Layer mask hide all. Darken mode. Paint in the window. Watch this video.

https://youtu.be/M8tIUU9unos

'Window Pull' is an alien term to me, sorry. I had run my Photography business for over fourty -five years. During that time, I took many house/ office/ shop/ hotel/ etc. interior photographs. If a shot included a window, that offered a decent view, I would take a light reading through the window, and that would be the basic exposure. (Remember, this is before digital had arrived) I would then add lighting to the interior to balance with the exterior brightness. The extra lighting was usually brolly flashes, either 'Studio Power', or battery units. The method was just the same whether I was shooting 35mm/ medium format/ or 5 x 4 The same basic approach was also carried out when Digital cameras were used. I found that setting the digital camera to M, was the safest starting point to establish the exterior brightness, and the reading was 'Set' into the camera. No further adjustment to that setting was necessary. More than one instance occurred when taking a series of photographs for a Builder on an Estate (Multiple houses). The 'Show Houses' were furnished , of course, but the view through a window could show half-built houses / site rubbish scaffolding etc. In that case, the curtains were closed, and just the room lighting was used. Todays equipment allows an instant check/playback on the camera. But in 'Film only' shooting, Polaroid shots (medium format and 5 x 4) were the only guide to ensure some sort of guide that the results were going to be as expected, before leaving the job. Confidence and experience counted somewhat, but Murphy's law (Sods Law) often lurked around the corner. I used a Gossen hand-held meter with the film cameras, but my Haselblads and Sinar 5 x 4 had TTL meters, which gave added assurance to readings on the bigger jobs. But the same principle remained, the exterior brightness was the exposure setting to use, and balance the interior with added light. In digital cameras I have taken two shots. One based on the interior lighting, and with the camera on a tripod, a second shot set for focus and lighting on the exterior brightness. Photoshop was used to merge the room, and the window view into one balanced picture. A number of ways to get the result with computer technology. I have closed my business, so only have myself to please, these days.