@Eric Coats, to answer your specific questions, estimating expenses are pretty simple. 

It's simple enough to make a row for income, and another for expenses, and then subdivide those expenses, and add them up in the total expenses cell and then subtract the gross income from those total expenses to get my net.

The median home price is also very low nationwide which creates a low barrier to entry.

Quote from @Michael Daniel: @Jaycee Greene these are low income areas however there's a lil room for rent increase but not much. 

Are you looking at the maintenance/repair costs of the homes once in place, W/S/G costs. septic expense if applicable? 

From experience, finding a knowledgeable accountant is key for handling taxes effectively, especially when splitting expenses, claiming deductions, and managing depreciation.

This is the BEST $100 you will ever spend, and if you listen to Amanda Han's tax book, you'll know it's also likely a business expense for you to write off :) https://biggerpockets.supercast.com/My perfect way to learn from the BP books is to listen to the audio book through the subscription above, then books that really stand out to me I go old school and get the physical copy so that I can re-read it, take notes in the margins, and put post it notes so key points are easier for me to re-reference in the future.

I was thinking of starting a rent increase for my 1 bedroom tenant voucher due it being low and well under fair market value(Based on  hud and zip code) but my tenant is in the process of having a caretaker for her disability and getting approved for a two bedroom voucher.

I have yet to have a guest ask for a refill or mention the quality (I tried to pick a nice-looking, not-too-expensive brand).Be careful with the scents -- I had a run of people pulling out and hiding the scents and one or two people complained that they were scent-sensitive in private notes. 

Financing can be expensive and difficult to find.