However, I am terrified of biting off more than I can chew and end up screwing my family even worse (we bought another home to live in so this would be secondary).

I bit off more than I could chew with the fixer-upper I bought 2 years ago.  

If so, I'd love to hear people's thoughts on how to bring that into conversation.Your time and mental bandwidth chewing on this with me is greatly appreciated.

I'm just really throwing myself out here looking for anything to chew on.

I do get nervous thinking about the what ifs...like what if I should use the $17k in another way, a way that would get me to more properties faster or what if this doesn't work or what if this is biting off more than I can chew.  

I have used the BiggerPockets BRRRR analysis tool, but not sure if I have used the correct assumptions.Property:  1241 W CHew, Allentown City PA, 18102 (2-unit house)- listed for $73k- Offer: $40k- Closing cost: $9k- Repairs: $16k- ARV: $90k- Rent: $1,800 a month- Vacancy, Maintenance, CapEx: 10% each- Water and Sewer: $100 a month- Insurance: $100 a month- Property management: $180 a month- Property tax: $261 a monthThis leaves me $232 cash flow per month if I refinance it at $90k at 5% interest rate.

This is where you can get chewed up and spit out if you don't know what you are doing.

But if he asks; tell him you clearly gave him more than he can chew.  

I'll message you sometime in the future and chew your ear.Thank you for the warm welcome! 

All I've seen online was very positive stuff, but maybe we are biting off more than we can chew for our first investment.