I would constant put it off & by the time I had to do it, I'd end up spending endless hours updating my QuickBooks file, trying to get everything right.

You can charge an increased deposit, pet rent, or require the tenant to carry pet insurance. 

Wanted to know if it's possible to send a tenant to collections after a move out/ evictions for additional charges the security deposit didn't cover.

I did eventually get them evicted and thankfully they didnt trash my property (though they left a lot of trash that cost me $500 to get rid of but o well).The other time this happened was a tenant I moved in who had a good job at a hospital, the hospital had a program where they paid the security deposit and first months rent.

I have received two offers some time ago from my current credit card provider for a 0% APR direct-deposit (for 1 year).

For example, drop the price to $1,500 but require a credit score of 700+ and a double deposit.

Consider all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

If tenants are moving out right after closing, do double check the leases clearly show the security deposit they paid the seller and you collect that amount at closing from the seller (credit to you) so you have those funds to then return to the tenants when they vacant under your ownership. 

Incentivism them to get out of the house--we have offered full deposit return (obviously that is done day they leave--draw it up if you need to so they are comfortable). 

The vast majority of lawsuits against Landlords are for wrongful eviction, security deposit disputes, and Fair Housing Violations.