I'm struggling to find good tools/strategies/professionals to help ballpark the rehab costs so I can make a reasonable offer. 

The cosmetic choices would be based on popular preferences that would appeal to hopefully everyone. 

I would encourage you to check out some of my posts on Market Data in NC, I have some of the most popular areas in NC broken down in easy to digest data.

I agree that you should be able to search for deals by filtering for the "multifamily" property type; that is a core part of the tool's value.

Areas like Central West End, Soulard, and The Hill are popular and have strong rental demand.Property Management: If you plan to rent out the property, consider hiring a property management company, especially if you’re not planning to live there full-time.Market Trends: Stay updated on local market trends, such as employment rates, population growth, and development projects that could impact property values.St.

Both seasoned and new real estate investors have a powerful tool: the 1031 tax-deferred exchange.

I have subscribed to propstream and have a way to create a funnel but I would love to hear feedback on how to use this tool or any other tool to effectively get houses under contract and to use my time efficiently.

BP has various tools to help you analyze your deals (rentals, flips, wholesale, etc). : https://www.biggerpockets.com/investment-calculators7.

I didn’t even realize biggerpockets had all these tools, thank you so much!!  

Our attorney explained the "DOS clause" as a tool lenders can, at their option, exercise in the event a transfer has occurred.