Visa renewal, contract hours reduction and a pinch of kojin jigyou

Hello everyone! I come here looking for people with experience in visa renewals that fall into the "not so common" situations.

I am on a 5 year visa, sponsored by a big company that brought me to Japan, but unfortunately I switched jobs to a different IT company (that might be a bit "black") as location was better for me. Only issue is that my boss only gives me only contracts and doesn't seem too willing to make me a permanent employee. I also have authorisation from immigration to engage in my kojin jigyo that I recently started and it seems like it will give me enough economic support (I am even considering requesting a change in my contract from 40 to 30 hours per week). Obviously the idea of this kojin jigyou is to follow all the rules and declare everything so that immigration is happy with my contributions to society in the form of taxes.

My situation with the visa renovation is that once it expires I will be just 2 months away from requesting PR through the marriage to a national route, but I am unsure whether my visa renewal will have any issues, as I feel my situation is not the most common one:

• If I am working 30 hours per week with my company, but with my kojin jigyo I can make enough money to sustain myself (and compensate/exceed the salary reduction due to less hours compared to what I was making as a full time employee at the company), will they renew my visa for more than 1 year?

• If I am working on 1 year contracts, will they give me a 1 year visa renovation?

• Can I get the engineer visa renewal denied? Like not even 1 year? If it gets denied, can I then switch to the spouse visa? Or should I directly apply to the spouse visa instead of renewing the current 5 year engineer visa?

• Would any of the above affect my PR application?

Still a couple years to get to that point and no guarantee I will remain at this company (hopefully I can find something better), but it still troubles sometimes (and the current political sentiment makes me fear how Japan, and specially immigration, will look like in 2 years).

Happy to hear your thoughts!