Be careful of the advice you get from unqualified persons here or in any forum.First. 

Especially in todays' day and age with all the chaos going on in the world.It's important to have a vivid vision and use that keep yourself going when the going gets tough!

Another thought I had was to keep the same pipes but put meters at key parts in the piping where I know it is dedicated to a specific unit in the house.

We talked for several minutes, then out of the blue he said he would offer seller finance if he found the right person to sell to.

The materials are outstanding and my understanding pre covid the networking and in person classes where very beneficial .

First, check to see how many deals this person has already done. 

In my personal opinion, I think the largest factors will be the state of the economy; primarily unemployment rates as well as GDP growth.

I’m aware California is not the best market, with the restrictions and potential new tax coming up, etc, but we have personal reasons to invest there.With that said, we visited a lot of houses in the San Diego area and saw 2 that seem like a potential fit for us: one is a smaller 3 bedroom but a mile from the beach and the other is a 15-17min drive to the beach, but bigger with 4 bedroom and a little cheaper, which would allow us some cushion to invest on a hot tub or potential pool.

Just would prefer to keep them month to month unless it’s going to be a issue.

It’s super relatable, especially since your friend is around the same age and also just getting started.Also, as someone who works closely with newer investors, especially those with busy careers like your friend, I’d love to share some insight on how she can diversify her income while keeping it relatively hands-off.