You can do a lot of the projections you're talking about in financial planning software, like estimating RMDs. 

When do you plan to pull your cash out and do a cash-out refinance/do you ever intend to do this?

I plan to live in the ADU and rent out the main house.

On paper, the plan here is that you get some rent from Section 8 directly and some from the tenant.Are you still getting any rent from section 8 ?   

The issues get a little deeper, but the key takeaway is that careful planning is very, very important.  

I was planning on focusing on small multifamily properties (duplexes, triplexes, and quadplexes), but I'd be interested in hearing people's' thoughts on the best investment type for the area.Thank you for your time.

Each investor who evaluates your deal will have their own plans for it in terms of rehab & contractor pricing.

You will know from your conversations who is a right fit for you and who is not. 

Save for Your First InvestmentCommon Pitfalls to Avoid:Don't rush into deals without proper due diligence.Avoid over-leveraging or taking on too much debt.Be cautious of "get rich quick" schemes; successful real estate investing takes time.Don't neglect legal and regulatory considerations.Remember, everyone's journey is unique, and there's no one-size-fits-all approach.

As for the rodents, call a company and have them come out and deal with it...take photos before and after so if the tenant does something (ie puts out more rice), you can show that the tenant is deliberately doing things to attract rodents. ya we planning to call the health inspec saying the fridge is their to use but if they make it dirty and smelly we cant control that and its their responsibility.