What it could do though is get the next PA house almost paid off leaving a much larger cash flow. 

Doubling up on deposits or requiring larger deposits might weed out some of the riskier tenants upfront, though it's not always a foolproof solution, especially in markets where affordable housing is tight.Regarding your point about double security deposits, you're absolutely right-this can be an effective strategy.

Feel free to inquire about their staff qualifications if it's a larger organization.2.

However, since we are staying out of the country, we would like to look for a reliable airbnb property management companies to do the end-to-end management from task i.e. listings, fixing a broken lock, get the house clean, liaise with guest etc.Any recommendation?

Partnering for larger deals can help buy larger properties.

In terms of financing, one thing that might be worth exploring is connecting with local banks or credit unions that are more familiar with the market in Ohio-they often offer more flexible terms compared to larger national lenders.PS: Here’s an interesting tidbit-Ohio has one of the lowest property tax rates in the country, making it even more attractive for real estate investors.

Buildium would help with the expense tracking but also enable PM tasks such as lease renewals, maintenance requests, rent collection, etc.

I just need to know is there any type of private lenders who specialize in much larger transactions with having windows on time of finish which I estimated at around 2 years.

This allows you to be able to indefinitely defer all of taxes on investment property, and use it to purchase larger or multiple investment properties.

We have a few projects under our belt that we also own/manage at this point...we completed an 8 unit project (all rented) and we completed a 5 unit project (all rented) and we are in-process on a 9-unit project and have a larger one in the hopper (maybe 18 small units that will be sold, currently has two units rented).