Existing invoicing business with room for marketing partnership. Poll included to for feedback.

At the start of this year I finished up on the MVP of my own invoicing program. It's a full package with quite a few features that similar sized competitors haven't quite yet accomplished to date. In addition, this is a program I've been able to use weekly to manage my own small business finances, so I know it has a good foundation.

Over time I found that my interest moved elseware to forfill other life goals (ie, getting fit and getting outdoors) and temporarily moved away from active development on Responsive Invoices (https://responsiveinvoices.com/).

Is there anyone interested who would like to work with me on an existing product that's already marketable and is up to "modern" development standards? After the last year I'm now motivated again and would love to see this product move mountains. My goal is to promote this product to a position where it becomes a nice passive income with only a few features required each month.

You can see a good history here, with a few background notes on how I went about it - https://www.indiehackers.com/product/responsive-invoices

As a bit of fun I've also thrown in a poll. It would be great to see what people think of how to approach my situation.