I'm not into traveling and prefer to delegate the property selection and management to others who are more qualified than I am. 

I'd recommend having them sign some kind of release of information document to ensure they know you'll be doing all those checks.For advertising utilize all the free options you can (e.g.

I'm assuming the house is furnished being a model home and that the builder is "renting" it for purposes of showing the house to prospective buyers in that development.If the above is correct it's possible the buyers could insure the house as a vacant property.I think an attorney should write up something for both parties to sign showing the builder assumes liability while showing the home.

You need to create some form of a tenant selection plan and before they apply they will know what your criteria is.. example 600 credit score 3x income etc.

Do you have a checklist signed by tenant when you did the move in walk through with them?

Either love will run its course and he'll disappear after a few months, or love will get serious and they'll eventually move out or sign the lease together. 

It looks different than most list generators since it claims to have a list of people in my area who have actually signed up on their website specifically saying they have money right now that they are looking for someone to lend to as a real estate investment. 

First the bad news: In order to form an LLC and sign US legal documents, you'll need to be at least 18 years old.

What options have come to our mind are:Facebook adsBandit Signs (tried it before not much success)Direct MailBesides these options what other ones can you think of and which option do you recommend primarily?

upon signing of the lease or move-in of the tenant?