Their qualifications and income weren't so great.

After that, it is prop up your feet and watch the big screen time and all thought or efffort for mortgage qualification becomes a distant memory.

Much of this assumption thinking is a hang over from FHA and VA loans that were assumable without qualification, those being exceptions.

Asking for exceptions in rules or qualifications.  

You might want to consider the qualifications of someone before you call them a moron.

Get with a lender that has experience in funding people who are house hacking and see what exactly you qualify for with your approach to the property.   2nd get an agent to do some sold searches for your price point (based on your lender's pre-qualification) and property requirements in the whole metro area.

In this email, repeat the basic information in your ad (bedrooms, baths, rent, no pets etc) PLUS information on  your basic qualifications -- minimum income / month (in dollars - don't expect them to do math!)

Do they meet your qualifications? 

I don't charge a fee for the application, but my qualification and application criteria note similar "due" dates/times.

Most lenders won't consider income from a trust (as in an irrevocable trust that defines the periodic distributions to its beneficiaries as income) when considering qualifications.