If your name is not on the deed, then you are not a co-owner, just a co-signer on the loan.  

Depends if you are looking to be a co-host (as listed above) or a full service PM.As a PM we list the property (on 15 sites, not just Airbnb) and we handle all the communication, maintenance, cleaning, reporting, etc.

The alternatives to using the delayed financing exception are:CO-refi again later to pull the remainder outForego the exception and wait the 6 mo's seasoning and do a CO-refi for the full 75% LTVGo with a lender who writes non-conforming or commercial loans that have fewer restrictions with more expensive terms.So, while it's possible to get 75% LTV, there is always a trade-off.Also consider the impact of consistent 75% LTV on your debt-to-income (DTI) ratio. 

My mother is a co-trustee of a land trust from their deceased parents where she, her sister and one brother want to sell the land to receive their share.

One was from a co-signer, not the tenant (that's one of the reasons to get a co-signer for weak applicants).

Can they even get a CO in your jurisdiction without owning the property, or might it become a headache for you even if they comply? 

Not sure if that's any different from a co-signer.

I usually start with something like this:"We require a 550+ credit score as well as a current job paystub or a co-signer who meets these requirements.

The only way I am able to make this happen is because I was able to use my parents as a co signer, I only have a part time job and in college so getting approved for a loan wouldn't be really possible.

You mentioned a permit to buy a CO.