Then we would like to knock down the church and build a duplex on this parcel.

Both. as of right now i'm looking for my 1st property, and trying to figure out if i should purchase a single family home, or duplex. 

Reminder that from the CRE perspective, the following are "single family" homes: condos, single family homes, duplexes, triplexes, and fourplexes.

Most of my clients (including myself) work with duplexes or houses with ADUs.

I began my RE journey in 2015 by house hacking a duplex in Malden.

And the customer service is super fast and helpful, although I should also mention you are often just sent a wall of text to read.

I have an investor that just moved forward with a new construction duplex that happened to be fully rented when he bought it .Best of luck to you and connect if you would like to talk more. 

I plan to live in one of them thought it might be a good idea to use demountable walls instead of drywall to create extra bedrooms to rent out.

I have seen alot more success hitting the one percent rule if it is a duplex or single family home with an ADU or something like that. 

I bought a duplex and inherited tenants/leases last year.