See when you rent out SFH's, you usually can only charge rent.But for multi's, you can create additional income streams, like adding a laundry room, charging for covered parking, installing vending machines, storage, etc.You might know this, but the value of a multi is determined by the NOI (net operating income).

I know someone who owns a vending biz at several nearby state parks.  

Consider all the amenities provided - the parking lot, the building, the rooms, vending and ice machines, bedding, towels, linens, toiletries, etc.

When first starting out on this journey, you only need to know two things, you need to know the actual NOI and market Cap Rate of the property to determine if you have a deal.How to figure an apartment’s NOIThe first step to determine NOI is to calculate Total Income.Total income is simply the total of all income streams from the property for the year and can include:• Rents from the apartments themselves• Laundry and vending machines• Parking fees• Late fees• Any other incomeFor a simple working example, let’s say that we’re looking at a 100 unit complex where every unit rents for exactly $1,000 per month – ha ha, wouldn’t that be nice?

Vending machines perhaps.

But you can also buy a business such as McDonald’s/vending route / convenience store etc.I plan on having the 3 pillars of wealth:Real Estate PortfolioOwn a BusinessStock/mutual fund portfolio

I tried various things like owning Vending machine business which was hot during 2004 timeframe with out of town companies promoting it.

They are not going to be real interested in your "value add" or your increased NOI because you kicked out the laundry vending  company, bought your own machines and doubled your monthly laundry reciepts...

You need to also look for passive income streams , Something like a vending machine or maybe washing machines for students.

@Ivan Lai - this is from the perspective of a guy that specializes in sales/use/property/excise/and occupational taxes (I've been doing this for over 25 years).Generally, when a rental contract is written, the Tax Department and the Attorneys get together so they can create wording in the contract that allows any taxes charged to the business (CSC) to get passed on to the customer (you).I've not worked with a company that rents laundry machines, but I've worked with a lot of companies that lease equipment - everything from vending machines to telecommunications equipment to a company where I currently work that leases credit card terminal type equipment.Your profile indicates you have units in Southern California and in Houston.I'm just guessing because I don't know specifics...Los Angeles has a "Business Occupation Tax".