Just don't change your address to your parent's house, that would throw up a red flag. as long as that remains your primary and you aren't renting it out for at least a year after purchase, there shouldn't be any issues. 

The additional income from STR could justify the renovation costs, but it requires active management and market awareness.LTR or Break-Even Strategy: Renting long-term might simplify things, but if it only breaks even, you’re right to consider if appreciation is enough motivation to hold.DIY Basement: DIYing the basement could increase STR appeal without the full $50K outlay, especially if extra space attracts more bookings.

If it's listed on the MLS there's motivation.

Just trying to find out how to secure remaining 20% for seller

I actually got an option from a buyer to buy all of my remaining properties in cash.

You should most likely price it at a return of 8% to 12% depending upon remaining term and payment history.

Don't just call them once... make it a point to remain in regular contact with them (at least 1x per month) via phone, face to face, email, text, social media, mail, etc.At the same time, make it a point to add X number of NEW contacts to your database each day or week.

Ready and motivated to get on it and grow now all over the USA and internationally if possible and convenient.

And if they use public funds the property has to remain affordable housing for THIRTY YEARS which is insane.

It really can be the best of both worlds—remaining a passive investor while still getting the ROI you want!