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.

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

How much of a credit do they offer at closing to cover the servicing fee?

It’s 100% bonus depreciation for properties placed into service in 2017-2022, 80% in 2023, 60% in 2024, 40% in 2025, 20% in 2026 and completely phased out in 2027.

It seems that if you can find a good deal on the purchase price, are willing to do cosmetic updates (floors, painting, maybe a kitchen) you can get that 100-200/month cash flow.  

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

Cabinets/trim go in this week and flooring should be going in within the next few weeks.

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. 

<g> If she is very determined not to have the central heat on she can turn off the service switch at the unit or even turn off the circuit breaker to it.

One of the more overlooked downsides is the funding fee; however, if you have a service-connected disability rating, the VA funding fee is usually waived.