For your existing rental property, the net rental income from your Schedule E on your most recent return will be used in your DTI.

Nine  states are COMMUNITY PROPERTY STATES, where all property accumulated during the marriage, OR the INCREASE in value of existing separate property (property accumulated prior to the marriage), is considered community property which can only be divided 50/50, UNLESS the division is made to offset some other imbalance .  

It is cheaper with better financing to purchase a property with an existing ADU than add one.  

It's successful in high-cost markets like Southern California but faces challenges like high entry costs and local regulations.

DFW AirBnB is getting expensive to operate and find good deals due to all the HOA regulations that are being implemented..If the property won't cash flow in LTR, then your option is limited to listing it, but I don't exactly know without looking at the numbers, as you can figure out some month to month strategy to lease the unit for a while.One thing that I always tell my clients is that when you are doing AirBnB or any STR/MTR, you are entering into the hospitality industry.

@Zach Edelman Lexington has a decent amount of STR regulations now with more on the way.

In general they will add the ADU only if it is existing living space such as workshop, bunk house, office, etc.  

Am I, as the owner, responsible for pests that may or may not exist outside of the house and are brought into the house by the Tenant's dogs?

If you are looking for loans on real estate or a business lenders don’t necessarily care about the credit history of the LLC - they care about the performance of the asset and your creditworthiness since you will most likely have to sign personally.I have established multiple LLCs just days before closing on large loans for different assets, those particular entities barely existed and the banks did not care.If you are talking about pulling a business line of credit (like a HELOC, but against your business equity) then the banks like to see some history of revenue.

Something to keep in mind though is that with the DSCR it is a new mortgage which entails higher closing costs as well as paying off any existing liens.