Buying for less and selling for more does not tell the whole story. The time between those transactions can change the amount you keep.
Write down the cost of waiting
Include financing, service charges, maintenance, insurance and other costs that apply. Account separately for any rent received and the expenses of earning it. Check when remaining purchase payments become due.
Calculate more than one outcome
Compare the intended sale date with a later one. Keep the resale price unchanged first, so you can see the effect of additional costs. Then examine a lower-price outcome. A delay can reduce profit or create a loss.
Make sure your capital can support the plan
Distinguish the cash needed at purchase from the cash needed to hold. Agree how additional costs affect the partnership calculation and your share. A planned sale date should not be treated as cash already available.