There is a video (free on YouTube) by Attorney Jeff Watson titled "How To Do a Subject To And Do It Right" that I highly recommend. 

Pending Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Quote from @Brook Burns: Thanks so much for the recommendations!

A good real estate accountant can save them thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend that they find a tax accountant who specializes in real estate taxation, business taxation, financial planning and tax planning.I would also recommend that they look for a accountant willing to work with them throughout the year, who can help them strategize and who is responsive when they want to know the consequences of the financial decisions they are making throughout the year.Good luck.

For lenders, I have access to private money lenders or if you want to go the traditional route, I recommend checking out Coast to Coast - Jeff Weller. 

This is (1) not something I'd recommend to a beginner, and (2) not something I've been able to do yet. 

I find the interface easier to manually update rates across my portfolio, OwnerRez doesn't easily let me match rates across my properties on a spot basis (unless anyone here has other recommendations that uses OR).  

I would also mention that once you have invested in Utah, I recommend the Utah Rental Housing Association as a resource.

I'd recommend staying within 10-15% of the median priced home because that's where the most demand will be not only for renters but owner occupants as well. 

Quote from @Esther Iroko: @Nathan Gesner please don’t have any attorney that you can recommend.