Customer service is unresponsive.  

The worst thing is to pay for a service where you don't get a benefit.If you have STR's and actively manage them, then there is a good chance that you can treat the propreties as active instead of passive which will allow you to offset the losses with other forms of income such as wages, interest, dividends, gains, etc.

I don't advertise any services.

*Location Matters — Neighborhoods that have high demand, quality schools and close proximity to shops and services tend to draw buyers willing to pay a premium for a well-renovated house.

List my home for an isurance company who has a relocation service department 

You are using both tax sale and mortgage foreclosure in your posts, so I can understand why this post went unanswered for so long.If we are talking the upset tax sale, the simple answer is that the liens remain in place.If we are talking judicial tax sale, the simple answer is that the liens will be divested (at least for those where proper service of the notice of tax sale was properly delivered to the lien holders).Which leaves mortgage foreclosure.

Your plan sounds feasible, but there are a few things to keep in mind:DSCR Loan Flexibility – DSCR (Debt Service Coverage Ratio) loans are designed for investors, meaning there typically aren’t occupancy restrictions like conventional loans have.

Also, if anyone knows of any other background check services that are more reliable please let me know.

There are investors with 15% down options for DSCR, just need to make sure the property can debt service itself. 

You could make this work ST, MT or LT, depending on how you approach it - the key with unique grounds is owner-provided upkeep and service built into the listing and what permits allow.