You didn't even start your project and you're asking if you should continue or stop there...
Try to see if there is already a market for your project.
If there is already something like that or near your idea, check codecanyon to see if there is a template which is close to your Saas project idea,
buy it and hire a developer to tweak it to your final idea.
If you didn't find a template for your idea, create a job on Upwork with a symbolic $5 and see which proposals come then.
You can also do the same thing here.
You will then know the required budget and try to build a plan from that...