No personal experience here but here's a helpful reference from someone who wrote a blog about different aspects of a 2 flat remodel in Chicago Scroll to "Two-flat journal 6: How to make an all-electric house" - - speaks a little about heat pumps and cost In the HVAC section.  

What are some recommended platforms or tools that help streamline the payout process for multiple clients while keeping everything organized?

Purchase price: $79,900 Cash invested: $26,000 Sale price: $142,000 With the help of an investor and contractor, we purchased a condo at Intercoastal Village in Little River, South Carolina that needed a ton of work.

Any guidance would be helpful thanks! 

If you're diving into BRRRR opportunities, I'd be glad to help you assess deals or explore financing options.

I would absolutely LOVE to connect with experienced real estate investors/professionals who wouldn't mind helping a young 20-something get into the game and navigate all the landmines that I do not even know exist.Excited to be part of the community,Justin

We offer education, networking and benefits to help you get started. 

Quote from @Loukya Challagulla: can someone point to any insurance company offering insurance for California multi family homes that are 5+ units and built in 1950sThanks @Loukya Challagulla Happy to help.

Thanks for any help you can provide!

Please let me know if you need additional information to run numbers to help out!