That's what they approved for her to live in your unit based on 1) their determination of the market rent for your unit for similar properties of your bedroom size 2) the affordability of the rent plus utilities of your unit based on her income and 2) the max benefit for the bedroom size of herb voucher for your market.

Stairs add an extra $10-$13 per step plus Sq ft and 30% waste.ENTRY LVP / Laminate: $7.85/Sq ft with vapor barrier underneath.

You can look into her being a 'silent partner' as well.

Do you have a proper vapor barrier covering the soil?

Recently moved to FL and will rehab my first house in this climate.  1,200 sq ft house with 0 exterior wall insulation and NO vapor barrier. 

Could care less if they grow herb long as they dont smoke in the house

We would like to do a tenants in common deed with her being listed as 80% owner and me being listed as a 20% owner to satisfy the 1031 exchange rules.

I'm not sure the implications of her being a HUD tenant on this. 

He was paying half the rent so starting last February she started to fall behind... to the point where a month ago she turned her being late on rent - back on me, saying I was always hassling her for rent.

@Adam DrummondAdam, your profile tells me you've been in the business for a bit, but still, word to the wise -- respirator with organic vapor cartridges is a must when working with oil-based poly.