[tattvamasi]

i am not particularly qualified to answer your question, but good enough to understand and pass my view: here is my opinion

#1 every prod/service that you offer has/will have competition and way to break it.

#2 programming/building stuff is never going to be a problem to worry. For developers who want to start business there are many other things to worry about , the quick we realise it the better.

#3 Try to be friends with business partners but not the other way. look for partners/money when you need them;

#4 All failed entrepreneurs are very well respected and this black mark theory is nonsense (I am sure at least in India this is not the case and you should avoid companies with that mindset. there are lot other ...)

#5 If you want to get your MVP done with limited time you have without quitting job, try to outsource it (money can get you time).

I suggest you to (re)read 37 signals and complete something tangible quickly. Completed product with 1% features is far better than unfinished product with 99% features.