Just remove these:
0 days to 2 weeks : You cannot sell the house.
2 weeks to 1 month : You may sell the house up to 1x MP + furniture price.
1 month to 3 months : You may sell the house up to 3x MP + furniture price. (Ex. MP = 150,000 FP = 55,633, SP = 50,000 - Highest buyout = $555,633)
3 months to 6 months : You may sell the house up to 5x MP + furniture price.
6 months + : You can sell the house at any price you want.
Allow people to sell houses for 1x MP + furniture price, max. This’ll stop people from flipping property and you won’t see any crazy unrealistic prices anymore.