Sell on L/O

I have a duplex under contract. Its worth approx 100k, bought for 90k, $650/mo principal only payments with 4 year balloon. The upstairs rents for $625/mo and the downstairs rents for $425/mo.

I want to sell it on a L/O to a tenant buyer. Can I structure it as follows?

Upstairs tenant buyer pays option consideration = 2k+, rent is $850/mo with $300/mo as rent credit (tenant pays extra $200/mo, I chip in $100/mo rent credit. Purchase price is 120k in 4 years.

–All while keeping the downstairs rent of $425/mo.

Thanks

Are you going to sell the entire building to the one tenant? You can’t just sell half.