Why does Nascar and Furniture ring a bell for you? 

Their business model is scraping the internet for every furniture vendor and charging whatever markup they can get away with.

You can find more about that here: https://www.sandiegocounty.gov...San Diego is trying to up-zone neighborhoods to fit higher density to chip away at the supply/demand imbalance for housing, their effort results in "Complete Communities" which you can learn more via this website: https://www.sandiego.gov/compl...

In my area, contractors are in short-supply and the best ones are booked out for months. 

Renovated grain silo at entrance and added recreational pavilion complete with outdoor furniture, stocked fishing lake, fire pit, and landscaped and lighted entrance.

In connected manner if part of your strategy is to reap equitable gains generally speaking a SFH investment is your best vehicle to reap such as a MFH has a primary valuation based upon revenue production which rents do not tend to swing as significantly as home values can in a supply demand situation or in a re-class situation such as flips, done correctly, focus upon. 

I have been building a lot of built-in cabinets for my house so that I have storage for stuff and I also don't have to purchase individual pieces of furniture.

Now the floor is buckling, causing furniture pieces to wobble, etc.

For example: A booking fee to cover CX/CC/Supplies/Refunds/Charge backs etc is reasonable those would add up to ~6%.

Even if you hook up with closing agents and really hussle this full-time, the amount of income you can make is minimal for the amount of cost you would have to invest - state licensing, insurance, advertising, supplies, etc.