Not at all.I've been answering questions on here for 10 years without ever asking for business and have made 1000s of friends and helped 100s of clients close deals on investment properties.

I own a rental property (4 bedroom house)  and the Tenant is using the property as his business address for his construction business. 

Any ideas or strategies would be helpful.

The answer will be dependent on your fact pattern, so a general forum like this may not be able to answer such a broad question.With regard to the LLC structure, note that CA does not recognize series LLCs, and CA tends to have a broad opinion of what constitutes "doing business" in the state, and therefore, what LLCs need to report with the CA Secretary of State and file appropriate tax returns. 

Im now sitting on more money than ive ever had in my life and i have no idea what to do with it!

The only time I will go to a closing is on the brokerage side of our business and it is a first-time home buyer. 

Any Idea what the price range would be for the "minimum purchase amount" and what would the "buy in bulk" entry amount be?

My income is a bit low but my business partner does have a solid income.

I would greatly appreciate any advice and insights to better understand the local market and connect with real estate investors specialized in rental properties.I look forward to engaging in meaningful discussions, exchanging ideas, and build valuable relationships with other members.

They will likely know of your property, or at least be able to get an idea and let you know what they are seeing in your market for your quality of space.As for how to calculate, there is no set strategy.