Website framework inquiry

I would absolutely more than happy to hear your viewpoint worrying adhering to circumstance.

The here and now net website is made in personalized CMS that was never ever before prepared to be SEOed.
Modifying complete website with bundled payment part as well as likewise the acknowledged system resembles additionally much task.
I recognize that it would absolutely be the greatest option.

The alternative is to leave the web site as it is as well as additionally establish a new location that will absolutely target connected keywords. Based upon WordPress, as an instance.
Query is: will as well as likewise simply exactly how the “” old”” part of the web site impact SEO performance of improved websites in the new location?

numerous thanks