Also the stairs could be a deal breaker if you are in a retirement community your intended renter is a senior. 

Disinvolved replacing the meter panel entirely and running to new service lines to the breaker panels.

It's a deal breaker for me (mind you, Florida is at risk too).

Are those facts deal breakers?

Circuit breakers are fine.

The lack of a second bathroom may be a deal breaker for some buyers and therefore, result in appeal differences. this may be especially true in 2 story houses, where you have to go to a different level to get to the bathroom.

D-1-GN-16-002939 Travis D-1-GV-12-001425 AUSTIN CC-17-06044-E DALLAS 2013CI10367 Bexar County, Court 045 17-2905-211 Denton County 15-0137-C277 Williamson C-1-CV-19-002060 Travis C-1-CV-16-010712 Travis C-1-CV-17-010820 Travis C-1-CV-18-003876 Travis D-1-GN-19-001295 Travis D-1-GN-19-001694 Travis D-1-GN-19-001705 Travis 429-05770-2018 429th Dist TX - Collin 18-0653-C26 26th Judicial Ct - Williamson 2014-013559-CA-01 FL Circuit & County Miami Dade PM me and I'll send you the initial complaints, but they are available to ANYBODY, as they are public record. 

I would need to add plumbing for the kitchenette sink and electrical for appliances but I'm not sure if my breaker has enough room for another 240v for the stove. 

A few questions:- Are these 2 items deal breakers?

Negative cash flow is not a deal breaker for me but as an investment I have to see a means to generate return that justified the effort and risk of residential RE.