Hey @Guan Hong Guo - yes combined income *assuming* all adults are on the lease (as they should be if they're residing in your property).

Purchase price: $108,000Down Payment: $25,000Interest rate 11%Balloon: 36 monthsPrepayment Penalty: NoneProperty is in Mission TX it is 5 units, currently 4 of them are leased for a total of $1,550/month

would that void the current lease?

I would try to buy properties starting at a specific date so not large ticket items come up.

I would stop work until an itemized scope of work and cost to completion is established.

I manage properties remotely and can handle all the leasing/management pretty easily with my team.

The following are the key items I would recommend investors pay attention to:A. 

January rent has not been paid to the property owner, as I am sure the lease spells out, but to someone else.

I was in a leased building, counting on a hand-shake deal to buy the property in the future.

Having a lease from someone that has no authority to lease the unit does make them a tenant.