Do they not vet their clients for creditworthiness?

There may be other ways to raise your creditworthiness than throwing a lot of cash at debt.

A decent agent who looks out for their seller will always independently verify the ability of the buyer to purchase the property, which means at a minimum looking over their proof of funds, and oftentimes their credit worthiness too.Just FYI, just because a lender has "preapproved" you doesn't mean squat, you've still got two to three weeks left of real vetting to look forward to before you're actually approved.

In other words, you're basically proactively giving her all the same type of info a bank would ask for, and acknowledging "I don't have a conventional bank pre-approval letter, but based on this information, you decide for yourself if you feel I'm credit-worthy."

After all it's not like we're a cashless society that pays for things with computer chips in a card and have a level of wealth measured in market value of nontangible divisions of ownership in companies and fiat currency based on faith in government, not to mention an arbitrary number assigned to us that determines our creditworthiness. 

So basically, I'm a big advocate for the NNN lease, but make sure you get in a good, creditworthy tenant.

If you have a 760 FICO and no debt, and then suddenly take on $400k in debt, you are in fact objectively less creditworthy until you prove you can handle the new debt, and your FICO score will reflect this objective reality.

If you mandate auto-delivery the tenant will likely need to have some sort or creditworthiness before a fuel provider will allow this, some simply won't allow tenants to do it period.4.

We have very similar financial situations with similar cash available and creditworthiness. 

I have a couple of clarifying questions for you for curiosity sake.1. is the co signer simply brining their "credit worthiness" or are they also bringing funds to help with the down payment?