I am thinking about doing my first flip to acquire capital.

Suppose my goal is not necessarily cash flow (say I have a full time job that pays around $250-300K a year and I don't plan on leaving it, and this provides enough cash to acquire properties), but rather wealth accumulation -- does it make sense to take the 15 year loan with lower interest so more of the rent payments go towards building equity in the properties?  

My husband and I have a condo as well as duplex, we just acquired, and are trying to add at least one property per year focusing on multi-family in the St.

Probably wise to acquire something that you can afford to hold long-term [EDIT: I just realized that the Deferred Sales Trust I brought up in another comment elsewhere might become a popular option if it survives tax reform and the 1031 doesn't.]

@Noble McKenzie - I've acquired 3 properties via Lease-Option deals; however, I've yet to attempt to sell via this method - although I'm not opposed, and will certainly do so at some point in the future.

I have heard of people being able to skip trace to acquire that info, but I do not have any sources.

Nelson, as an experienced investor and a licensed Realtor, if you are interested in more of a turnkey approach, I can help acquire, rehab, lease & manage rent houses for you.  

I’m planning to acquire more properties, and I want something that I can scale.

I've acquired one property this way.

I've been learning a ton through various means for about the last 6 months and have made it my goal to acquire my first deal this year.