The end result (the aesthetics) will be much more important than any technical criteria. Using title/shift lenses will slow you down and so if that cuts into your time of covering the entire property and not really achieving anything more appealing, then is it worth it? For real estate, the criteria are very straight forward--basically appealing small reproductions for buyers. However, if you branch out to architects or architectural magazines, then the technical criteria are going to be higher.
What will be more useful is the control of light--I notice when the light is harsh, you highlights seem to suffer a bit (I like your work, I just notice that in some of your images). Perhaps looking into lighting techniques or playing more with time of day/weather might be more useful. At your scale of reproduction, it is easy to correct for perspective in post processing. But maybe learning to combine a few artificial lights would be useful.
I would start identifying some architectural photography you enjoy and start learning how it was made. Photographers are more than camera operators, which is really the least of the job.