Section-8, if it were mine I would seal off one window in he kitchen and add a lot more storage space.Space for brooms, mops, vacuum cleaners, cleaners, and extra things they accumulate over time.I would also leave a hole in the cabinets to the right of the sink for a large garbage can to go under the counter top.Adding some kind of sealer inside the trash area (like Formica) makes cleanup easier on turns.Whats up with the refrigerator plug?

However, I think it would take a while to accumulate another 20-30K for a down payment.

Interest only accumulates on the value of the certificate itself.

I always suggest for those that do their own bookkeeping or hire a bookkeeper to have their CPA / tax accountant review it after 1-2 months of recording transactions.It is better to fix issues(if any) in the start.I would say a good basic chart of accounts will have some accounts such asAssets - Cash, Real Estate, Accumulated DepreciationLiabilities - Mortgage Payable, security deposit payableIncome - Rental Income, Late FeesExpenses - Insurance, Mortgage Interest, Taxes, Repairs, etcBest of luck

Looking to use them to speed up my accumulation of cash for a down payment on a buy & hold single family home. 

Maintenance costs and taxes continue to accumulate.

Wealth we can accumulate but time is lost forever. 

After, more can be learnt as experience while actually lending or investing.What makes real estate investment a powerful tool for wealth accumulation is the 4 to 1 leverage available in many if not most transactions.  

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.

By the end of the 12 months, we had accumulated almost 10k in repairs and purchases to/for the home.