Now, the bank typically wants 6 months of reserves- will the bank except the equity I have in my personal residents as sufficient holdings for this?

The investors are typically talking about setting up a "power team."

The ideal investment in this economy is purchasing apartments but they typically, if done right, they will have positive cash flow every month. 

Well typically you'd want to get a lawyer involved to draw up a contract, since he's your brother I'm not sure if that's what you want to do but regardless you need to agree on the terms of the business relationship beforehand to prevent any disagreements and disputes:1) Who makes major decisions (ie renovations, evictions, selecting tenants, etc.).

But exposed existing structure with adequate insulation is not necessarily your only path to usable space in your attic.On the other end of the spectrum, you can always plan on a typical gyp board ceiling, as @Bryce Lee has suggested. 

They only look at bank financed sales, and they typically call the agents to confirm that they actually appraised for value ;) guess it would depend by state or locale. 

Commercial rates are typically higher than individual home loan rates. 

Typical rehab scene- tools and material everywhere.

You trade leveraged ETFs like any other stock, by buying X number of shares. 3) they are called leveraged because they typically have 1, 2 and 3x responses to the underlying asset.

I would ideally want to do what is typically done in a BRRRR strategy using a conventional loan, however I'm not sure if FHA loans have different rules, or if it varies from lender to lender.