It had one window in the studio room, and one window in the bathroom.  

I regretted doing it & now the 'bath fitter' solution is the only viable option as I am NOT ripping out another bathroom.

Definitely no set way you have to do everything, but basic things you always want to verify-- location, quality of the property (property inspection for sure), market rents (especially if needing to compare to what is being advertised), taxes and insurance costs, major due diligence on the management company since essentially the fate of your investment largely lies in their hands, tenants, etc.

This would essentially roll the new roof into the mortgage on the house.The question is - would you do this - include the roof in the mortgage?

Being paid to learn essentially.

New lines to the water heater, laundry, bathroom and kitchens.

Essentially, I would like to avoid PMI if possible.From my understanding, the government used to back up 5% down on (live-in) multi-units.

A buddy of mine told me basically the money you put into the syndicate as a GP or LP, you can essentially write off 75% of that thanks to the pass through depreciation.

For what you're talking about going from a ~1,000 sq ft house to almost ~1500 is a pretty material difference, as is adding that second bathroom. 

I've never had two bathrooms.