I did a dual degree in mechanical engineering and social science so it's possible I took one of your father-in-law's classes but probably unlikely.  

Best of luck to you as you seem to be on the right track!

Some cities keep track.

Track the income and expenses of everything you do in some sort of report and review it regularly with others you trust to possibly reduce expenses and increase your income and helps your company grow.  

Until i can start looking into possibly multi-family homes or build a good track record with a bank.

For instance, we use Google Sheets for tracking our assets, investor capital and event for a tape analysis, and those are available on any device that I have my Google account set up. 

But you're on the right track by not trusting their pricing as often people have their homes overpriced and don't get very many bookings because of it.

I just wanted to throw out a what if questions to see if I'm on the right track. 

Only the frame holding the glass is replaced - - it's called a Z-bar frame.If you're doing replacements, by all means upgrade to dual-pane, E-glass and make your investment worth the time and effort.

Many jurisdictions allow contiguous property owners to file a protest petition and stop you dead in your tracks unless you negotiate a deal.