I will outsource the creation of 300 backend pages on wordpress according to certain guidelines. I'll send you step-by-step instructions which include template name, file with translations for Loco Translate plugin, logo and favicon, code to paste into "extra css", so basically it's all about following the instructions. Apart from that, 8-10 seo-texts should be added to the text (I provide a place where you can buy them off-the-shelf and match them to the theme of the site).
More details in a private message. The order may be continuous because I have new backlinks to create all the time.