You also wouldn't want to create a cloud on the title, so doubling down and working with a legal professional/attorney would be best advised. 

I would need to put $45,000 down upfront, with a monthly payment of about $650.

Hi Willie, I think it would be best to wait until you have more capital to put down for a multi-family property. 

If so you should be able to cancel but if you are doing it out of the inspection period you are stuck and could run the risk of losing your earnest money if you put any down. 

@Pranita Maldikar Unless the seller is a family member or personal friend, I'm not sure why you'd want to put that much money down on the property.

I see too many investors now, put a significant amount of money in rehab costs and over leverage themselves on hard money loans with low down payments, their properties are not selling and they are lucky to just payoff their current hard money loan via a DSCR refinance. 

He's helping me to narrow down a potential multi-family property that I will be house hacking, (the deadline I have given myself to be in it is May).

Guest breaking down their markets and strategies gave me a lot of insight.

I started off with 3 houses on a lot and another house two lots down.

As others hinted 20K does not leave you a lot of room and would narrow down what strategy you can use.