No problem. I understand the problems that you're facing with feature creep. My brother had similar problems when he had his house built a few years back. I tried to help him install his molding but had to leave because I couldn't stand to see what he was doing. For me, how he was installing the molding was wrong but he was fine with how it looked. He was under huge pressure to move into the house

I'm not sure if they rent things like miter saws where you are at but get a good one, a few lengths of the home depot molding, and see if you are ok with the results in one room. Then make a call on if you want to invest in new tools, wait, or have it installed.

As mentioned previously, check how true and square the walls are. It will drive you to distraction trying to cut and fit 45's if the angles are off.