If you are unwilling to evict them out over this infraction, then wait out the lease and do not renew it.Whatever you do, don't make threats you're unwilling to carry out.A LOT of landlords here on BP like official letters as a means of communication.

The HOA can (and should) issue violation notices and beginning fining them continually for each infraction. 

Of the voucher recipients, 90% of them kept their units immaculate, never paid late, didn't have lease violations, were model tenants by any measure. 5% were about average, not the neatest, were late once in a while, park in other people's spots or left items outside their apartment - minor infractions. 5% consumed majority of management's time.My experience in private is similar in %s.

Listing the property on the MLS "too early" is not a minor infraction. 

(Be cautious about having inspections ordered because if the inspector is not on your side they will FIND infractions on your side).Talk with them, email them and always provide copies to them of any notices that you provide to the tenant.  

If the Due on Sale ever comes up the bank gives you time to a. refinance b. transfer it back to your folk's name c. give you paperwork to assume the loan d. you can sell the property e. you can get a hard money loan to cure the infraction

@Ben Freiermuth nearly all college students I run have credit history, and some criminal history comes up as well (minor alcohol type infractions).I think you're getting bad advice from any landlord that tells you it "might not be worth it to run".

You can be forced to distribute your entire SDIRA in the year of the infraction, with all proceeds taxable in the distribution year along with any early distribution penalties that may apply.

I succeeded when I had my issues by having a very hard line about... if there is an issue with legal infractions, please call the police if there is an issue with parking please notify the HOA.

I detailed every single infraction in formal notices to cease and to quit.