Hi Mike
I am a licensed Realtor in Houston, TX; Washington, DC; and Maryland.
I have worked with King James lending in the past. Rates range anywhere from 11-13%, for a short-term loan. Obviously, these loans are best utilized for fix-and-flips or BRRR strategies.
Regarding your second question, Joint-venturing is a great option, depending on who your partner is, and the vision you both have for the project. I build new construction duplexes in Houston -- all of which are financed under a GP-LP structure. Typically I contribute around $35k towards soft costs (due diligence) and my LP investors (primarily high networth individuals) contribute the funds needed to build the project from an equity standpoint (approximately $150k because we utilize construction bridge financing).
I have found that on my 4-6 month construction deals, investors target around 22-30% ROI.
For longer term investments where you were to collect a management fee (i.e., rentals), you would likely benefit from raising the majority of the capital, and contributing very little so that your liquidity is not tied up into any one deal. All asset types are generally attractive for investors, I have numerous friends in the multifamily, RV parks, office, retail, and other investment spaces. The key from my perspective, is identifying an attractively priced deal, having the feasible and well-thought out strategy, incorporating talented and reliable trades, and presenting the information to investors through a comprehensive presentation.
You are already in the right place. Bigger pocket, Facebook, Twitter, Instagram. Social media is the mecha for reach; along with social media, industry events are another place I have found my partners in the past.
Reach out with any questions.