Hi @Jinxiang XuSorry to hear thisRecommendation would be - Molberg Plumbing Fort Worth local (817) 754-5505They have done work for my clients and my primary residence 

It's been my primary with the business run out of the 3-car garage I built soon after getting the property.

It might make the most sense to just sell your primary residence and use it as 40% to 50% down payment on your future home. 

@Jon D. some questions, the answers may help you better focus.1) Why did you pay your primary mortgage off in the first place?

Some critical areas to clarify include:Marketing: How do they advertise vacancies, and what platforms do they use?

Our primary residents also has some equity, I have a HELOC with $166,000 available funds.

Bathrooms: Especially the primary bathroom!

One SFH, turned Primary house + JDU + Detached ADU.

If you can come in and operate effectively I think you'll find success rather quickly due to that.BTW - for a property management platform I would highly recommend Buildium.

Me purchasing it and renting it out to her turns it into an investment property thatvallows me to take advantage of all the tax benefits that come with it.She may lose the primary residence mortgage benefits she has, but I think what we achieve with the conversion outweighs the loss.Cashflow would be immediate and allow for quick savings growth for the next purchase.