Balane,
I am wondering what you and your boyfriend do or what skill set you guys have?
Also when you want to make 10k per month do you plan to leave your job and have some time to devote to remotely running your real estate investment or do you want to be completely hands off?
This may help dictate what is best suited for you.
I personally would try to parlay your skill into the way they can best relate to real estate.
For example if one of you were a mortgage lender at a bank I would recommend looking into doing private money lending.
If you guys work in the building trades you may want to look into buying and repair distressed properties. From there either selling them or renting them out.
It seems like you want to long term develop semi passive income. How passive that is will depend on what you choose. Typically the more passive/less time required from you the lower the relative returns are likely to be.
Long term I think that having larger multifamily properties can be pretty passive as long as they are able to support a property manager or they are purchased properly and can support the cost of property management. The flip side of this is that you still must manage the manager to some extent.
Your other option is to work in private money lending but that is going to take time to find good deals as well as vet the deals. Also if you choose poorly and the borrower fails you have the requirement of foreclosing and taking care of the mess.
Another thing you may want to look into is syndication but unless you control the deal you wont be able set the payout schedule or control money release etc.
If you could give us feed back that would help us tailor the recommendations!
Geoff