WordPress - store payment redesign/extension

Hello,

I am interested in redesigning an online store on Wordpress so that the price list of services is displayed only after selecting the form of purchase:

a) offer for individuals and companies without VAT

b) the offer for companies with VAT

In the selection of the first a) prices would have to be net-brutto, further shopping cart also, RODO regulations for company X, and payment through the plugged Cashbill on the site to the account of company X

With the choice of b) prices would have to be net+ 23%VAT, further shopping cart also, RODO regulations on company Y, and payment by propped Bluemedia on the site to the account of company Y.

Please provide quotes and completion time. The site stands on an external server.

The ability to put a new store (layout I already have), without losing positioning which is quite high at the moment, is welcome.