Hi and welcome to the forum.

Well, as you seem to be aware, a freshly graduated arts major is going to have a tough time finding a job in the US as it is. To be honest, you'd have a somewhat better chance with a few years of practical experience under your belt.

The teaching qualification won't do you much good in the public schools, as teaching qualifications in the US are controlled at the state level. Reciprocity between states can be tricky - I'm not at all sure how they handle international qualifications, but you'd have to ask at the state level in each state you would be interested in. Try the Department of Education in a couple of states to get a feel for the specific requirements.

Also, in this current economic environment, many schools are cutting back on "frills" like photography, art and music classes in favor of hard maths and sciences. In those areas, there is an acknowledged shortage of teachers and that's where you might be able to catch a break as a foreigner.

Buying property shouldn't be a problem, but do some research on what you're getting yourselves into. Find a property manager (often real estate companies will do this) and ask exactly what they charge and what kinds of expenses they handle for you (and expect to be reimbursed for). As a non-resident taxpayer, there could be a few complications the sellers on eBay haven't mentioned.
Cheers,
Bev