I think it's a great way to kickstart your investing career, but speaking from experience, it can be very stressful and uncomfortable to come home and see them every day.

(sight unseen from Thailand)  Nerve wracking and a bit more risky, but you reduce risk with a good realtor, property manager etc.

The small bump in the interest rate on a 30yr is your "insurance" for being able to reduce payments in a financial crisis.But most investors will stretch out their payments as long as possible to maximize leverage and cashflow.

Try not to let the little stuff stress you out.  

On the one hand, I like it because it might alleviate some of the stress the main fridge is taking.  

Only a part of that will be principal and interest due that will reduce loan balance.  

It will significantly reduce your credit score if you have maxed out credit cards.

Or reduce the cost of repairs from the price of the house.

When it comes to offending the owner with a low ball offer, I wouldn't stress over it too much.

Reduce call volume, more qualified applications, etc.Just don't violate fair housing guidelines....