Start a sustainable business that reaches profitably quickly. And one of the ways of doing so, without much capital, is to provide a competent product a lot cheaper than some company exploiting their customer's is doing.
I have several apps/books making me little money every month (few hundred ish, not enough to cover living expenses yet, I am still working on it), it's okay to take the route of competing on price, but you will eventually lose to VC backed company which can provide their app for free or below operating costs as they have a lot money to burn. And offering lower than market price might make potential audience feel that your offering quality might not on par (eg: Walmart).
My advice would be to provide more value than existing offering or just downright give more shit/care about customers, you would be surprised how many software companies out there doesn't give a shit about customers / uses automated chat bot to reply support ticket (Google, I am looking at you). Replying to customer as a genuine person has a lot more impact than using the generic PR-ish polite sentences.
This is just my advice, of course you can try to compete with price, no harm trying it first!
I'm gonna try and find your apps too from the link in your profile.
I understand that the cloud provides additional software products, services and flexibility to scale quick, but you pay for it.
But on most projects, if you plan for contingencies you can do well on bare metal using HAProxy for Load Balancing, database replication, lsyncd for some filesystems, etc. AWS is really a good commodity but more and more people complain on price ;P
Also SAS.
It amazes me how much money some companies are willing to spend on products that are worse than their open source alternatives.