I think the companies mentioned are good for custom windows but everything in the house was standard 36x48 and 36x36 dimensions.

Ask property management companies - you can reference a property you are trying to buy and get opinions from property managers, and sometimes they will even tell you how much rent can be collected5. 

If he has subcontractors like plumbers or electricians I pay their bills but if he has a day laborer for something small and fast like to paint one room he usually pays those one off expenses under his company.

We have plans and hopes for the future to grow and expand this company leaving God's touch, our touch, and the touch in which our brother in law would have left as well! 

Do you have recommendations on property management companies?

If you go through a PM Company or Real Estate Agent they can add the listing to the MLS.

I’d like to be an option and a resource to your company if that’s alright. 

Talk to Phila Water Dept directly about this issue.If you purchased it recently and randomly got a bill for that amount, it is likely the title company had an estimated reading and not an actual reading of the water meter.

They also have a GP who owns a construction company that specializes in apartments to do the renovation.

Also, wondering if it makes sense to look for companies offering loans under 75K of property equity, or is it typically better to consider private lenders?