Not a huge increase in cash flow, but you're picking up another appreciating asset. 

I have a renter in there now and am wondering if a cost-seg makes sense to do financially as I am planning to keep the place for 10+ years. 

It's mostly Class A properties, a few Class B.You may find the below copy & paste info useful in addressing your question:----------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Also, the whole point of hiring a PM is to handle tenant, maintenance, and rent collection, so if your partner isn’t actively managing but just supervising the PM, IMO not worth having a two people essentially looking over the same tasks.Contributing financially for one person and the other having no financial stake raises decision making questions, such as when to sell, how profits will be distributed, etc.

Also, if you are in a partnership with your brother, it is unlikely that you are going to be able to offset his W2 income if he is just the financial partner.

I was a SWO for 8 years, and the best thing I did to improve my financial life was real estate investing. 

Your LLC has no "business" other than the asset(s) it owns.

Unlike banks, which offer limited loan options, brokers have access to a wide network of lenders, including niche and non-traditional financing sources.Here’s what they do:Assess your financial situation to determine your borrowing power.Compare multiple loan products to find the most favorable terms.Negotiate rates and terms with lenders on your behalf.Guide you through the application process, ensuring you meet all requirements.Example: Suppose you have a lower credit score or unconventional income sources.

My goal right now is show them a few different options and the financials.

if you had a particular asset of real estate you were interested in I'm sure you'd be able to find a broker in need of help in one of those.