From my experience the maintenance on the properties could really eat into your cashflow.  

I used a hard money lender that would finance 100% of the purchase and rehab so as to not eat up bit a couple grand of that 43k. 

If you don't fall within that category you either get caught up dealing with the BS minutia of the business or are reliant on outside PM's that eat away any margin because there is significantly more time that goes into operating Section 8 rentals and don't let the "guaranteed rent" make you think otherwise.  

And lower income means food eats up a higher percentage of income, so rent has to be a lower lower piece.But even beyond that, when you are in very low income areas, even trying to push a $20 rent bump is disproportionately high and will cause a tenant to move. 

I would probably talk to or send a message to the downstairs tenant to let them know that although they may not be breaking the rules, their noise is carrying upstairs and for them to just be conscious of that fact when they are up late.

They do not always.....sometimes people have to eat some of the cleaning fees to avoid turning off guests. 

The firm's fee will probably eat 1/4 to 1/3 of your savings.

That means not traveling unless necessary, less going out to eat/drinking and avoiding unnecessary expenses of all types till your HELOC and CC debt is close to nothing.

It’s all about finding a balance that works for everyone involved.Regarding closing with short-term private money, it’s an option, but you’d want to weigh the costs and ensure that it doesn’t eat into your profits too much.

If that means a second job or eating noodles every night, so be it.