As an owner, I'd never allow someone to contract for repairs on the entire building without my consent or control, you might address that as you could scare him off.Much of the lease needs to be building specific, condition is an issue, I would want each major element addressed, roof, exterior walls, hvac, plumbing, electrical, common areas.

They had repairs done without my knowledge or consent.

. • A Seller cannot put a mortgage on property being sold by Land Contract during the Land Contract in an amount BIGGER than the balance due on the contract without the consent of the Buyer.What the Law Says a Seller Must Do• Every Seller must, at least once year or upon your demand, (but no more than twice a year), give you a statement showing the amount paid in principal, amount paid in interest, and the remaining balance owed.• The Seller must RECORD the Land Contract in the County Recorder’s Office where the property is located within 20 days of signing, and it shall contain the legal description of the property.

Second, beginning in October of last year, the TCPA was expanded to require express written consent for all autodialed calls to cell phones.

This does not require the tenant's consent or agreement, just that you have given them notice.

Holding a one half undivided interest means you can move in, you can rent your interest without the consent of other owners, you can also obtain a loan on your interest if a lender is willing.Not trying to mess over siblings, but they need to be reasonable as they can't get more if you don't want to sell without going to court and that can be a forced sale at auction, might not get the best price.They can also sell you their interest by seller financing to you, Dodd-Frank won't apply in this situation. 

The most plausible way in getting the property in my opinion without letting the approval letter expire is to give consent to let them stay there for 3 months which has obvious risks.

She could always have a lawyer review her situation, but if she doesn't want to do that what I know is below.Usually renters aren't allowed to swap out locks without landlord consent.  

With his consent you could get a credit report pulled to do a full check on him. 

It is not assumed with the consent of the lender but remain as part of the financing arrangement offered and created by the seller.