In our lease agreement we use we put that the tenant if they break the lease are responsible for any marketing cost, tenant placement cost, and other associated cost of replacing the tenant. 

Quite a bit of risk associated with the process and from what I am hearing from those who used to be more active buying tax sale properties in Philadelphia the risks are no longer aligned with pricing concessions.

I have also seen people show interest in condos and then realizes the fees/headache associated. 

If you are the LL, either an attorney can write one up pretty quickly if it's a complicated lease with special provisions, or your State Association of REALTORS should have a promulgated form you can use (I've had people pay me $150 to write on up for them in Texas where I'm licensed). 

Unfortunately, BP still has these options for example - so many of these Non-QM lenders need to use the "Private Lender" label - even though it gets associated with scammers like in the above

You can download a list of interview questions from National Association of Residential Property Managers (NARPM) and that will help you find the right fit.

Some good advice shared on how to mitigate the cost obstacles you are facing but I am afraid what you perceive as high costs are actually normal costs associated with single family homes of the vintage you purchased.

My company is one of the sponsors for the Raleigh REIA (Real Estate Investors Association).

They have one of the tougher credentialing processes out there, but they have excellent data that goes deep with relatives, neighbors, associates, etc.. 

When you are actually IN this business, you need to have trusted associates to work with.