Should I collect a security deposit, and upfront payment even though I'm sure he did that with the previous landlord? 

The insurance is only an extra $10 a month...Will make sure pool area is safe and secure with fencing and have tenants sign a pool waiver. 

It could be a non-secured loan for all I care.

-Yes I will be securing the property-What do you mean by "how can this be equal?"

I have a couple of rentals, but I am looking at a great deal that I can flip, but want to offer seller financing to secure cash flow coming in.

The issue for people that realize that apartments are better than other types of RE investments (in some areas) is they may not have the finances, knowledge, or support to secure said communities.

It's all about the time value of money and security of future payments.

If a end buyer puts up the cash to build will I be deeding the land to them and taking back a mortgage to secure my equity?

Today was a great day, I got my first deposit from my first rental unit.  Wow, this is great, time to start looking for another property.

I've done hundreds.Mark,Great insight shared above, thank you.Now, as an exercise, a hypothetical question that might help someone in the OP positions: if the OP (buyer) were to loan the heir (unprobated heir seller) a personal loan with a security guarantee of her interest in the unprobated estate (including the real estate) and then filed the personal loan in a UCC filing and also against the persons credit and filed a notice against the property with such claim guarantee then would that proactive action help the buyer to fight off potential other investors who maybe circling the wagon?