Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

Can provide all the benefits from a cash flow and tax perspective.

Worse case I just continue to manufacture them through my fix-n-flip business and buy with seller financing where available.Also, is tax lien investing really viable today? 

That's $1,600 per month plus to pay debt, plus at least $400 in taxes and insurance.

For example, you could create a weighted structure where a percentage of profits is based on cash contributions, and another portion compensates for rehab or management efforts.Rent Payments and Tax-Free Profits:If you structure it as an owner-occupied property, the rent you pay could be shared proportionally, but tax-free gains on resale may only apply to your share, as you’d be the owner-occupant.

BRRRR, Fix Flip, taxes, deal analysis, market analysis, marketing, financing, etc.  

There are also tax implications.

Weigh the long-term benefits of the low mortgage rate you have versus selling and getting $500k from a sale exempt from capital gains tax.

Credit is a factor as bad credit may limit options, or may have the lender require you to put 10 or 20 years of taxes and insurance into escrow. 

@Nicole GrazianoI recommend that you have a consultation with a real estate tax accountant regarding your taxes.Bigger Pockets is a great place to find a real estate tax accountant.