Since the seller may not have enough equity to cover traditional commissions, what are some alternative arrangements or strategies that can ensure fair compensation for the realtor involved?

While some pros don't care about the arrangement being mutually beneficial, some do.

I have had a couple two travel nurses that left a shared living arrangement to pay more at my house due to noise.4.

This sounds like a single family that was converted, so more of a mother-in-law suite arrangement. 

Did they arrange purchase price under market, locate the property and bring buyer and seller together, are they licensed, and a whole bunch of other factors should be weighed.

IMO the lenders will work out some kind of payment arrangements with those borrowers who can afford to pay - a loan modification with a higher monthly payment or a loan modification that puts the arrears into a second mortgage that is payable on sale or at a refi or at payoff of the primary mortgage.

I'd talk to her and remind her she needs to let you know if things are broken and together you will arrange to get them fixed. 

Smart buyers understand the value of a Buyer's agent and it certainly is not just to open doors.  95% of my clients are out of state investors purchasing in a market that they do not know nor live in, they count on me to walk the property, access repairs, provide comps and short term rental numbers, arrange and be present for inspections, as well as my ability to assist them getting their short term rental set up for them long distance.  

Tell me their answer because whatever they say will not be based on Luna, 301.7701, 7701, or anything that resembles someone who won't give you a blank stare before pretending to know.Remember, taxes are a hidden value good/service.

So fair have done about 7k in "upgrades".Ultimately, I am not out much if either one of us fails to perform on the contract, but my goal is to change the arrangement of the agreement so that I have a bit more protection and the seller still has peace of mind.Any suggestions on how I should approach this?