How do I solve this.

To me, this is a cost that won't "add value" to your BRRRR, so I would more strongly consider how much it might impact your ability to rent the unit/house.

Haven't found much resources on how to structure the deal whether to buy out partner's shares at existing basis (I believe this wouldn't be advantageous as I wouldn't get to mark the asset to market and lose out on depreciation) or open new LLC or S-Corp and buy out both partners (I would end up taking gain tax due to sale but would get new dep. basis).

With this new reality it is imperative that buyers are aware of these expenses prior to submitting offers on homes; they should also be aware of the risk that these costs can appreciate aggressively.https://www.nbcnews.com/news/amp/rcna163853

This one will require moving several walls to reconfigure the space.

It almost reads as if you are buying a house and you haven’t closed on the house you are planning to resale. is this the case?

This is the backbone of trust for your business.

For criminal background checks, services like TransUnion SmartMove, RentPrep, or MyRental are commonly used and provide comprehensive reports that include criminal history, credit checks, and eviction history.To verify how much they make, you can request recent pay stubs, bank statements, or tax returns if the tenant is self-employed.

And yes, we have had to switch floorplans in a few situations, but now from experiance we can avoid lots that we anticipate will cause this issue.

Hope this is useful - all feedback is welcome!