Account Closed's book The Book on Rental Property Investing he talks about going for a 10% forced appreciation in the first year by fixing the property up a bit.

You need quite a bit of forced appreciation to BRRRR, which I doubt you would see with just painting the place.

Also, some of these require building an addition to force a value increase.

I know he is well aware of the foreclosure because he's been fighting it for years and 3 times filed an emergency motion just days before the sale day forcing them to reschedule, this time he filed the morning of the sale, the judge denied the motion and the sale happened. 10 day redemption period has passed and CT was issued. 

You cannot force someone to do something or take a specific action.A few ideas on exit strategies. reinstate loan in full and have the borrower make payments according to original promissory notepayment plan (forbearance)loan modification (my favorite)discounted payoffsales assistance (sell the home)short saleforeclosuredeed in lieu of foreclosureforeclose, then rent the propertyThere is much, much more to be discussed on this topic, as this only scratches the surface.Josh

Most owners will be forced to drop their rents and will likely have negative cash flow.

If he does and thinks you are incorrect on the progress of the project and does not want to rectify the situation then I guess you're forced to proceed to the legal end of things.

I am a veteran, retired from the Air Force Reserve.

You see there are external forces that we are coerced into facing like it or not.Many shy away from MFU-5+ units, but they do avoid the DTI problem.The practicalities of life and RE will keep at least one foot pinned to the ground.

FHA allows you to buy another property, but only in special circumstances, such as forced relocation for work, family size increase, or losing the house to a noLongerSignificanOther type situation.