How to handle ALOT of similar landingpages for local businesses

Hello. I have a client where their purpose is to generate leads to their members who are independent painters. The client has approximately 80 members spread throughout my country. How would you go about creating landingpages targeting attractive keywords for this? My client's website has very low organic traffic. What I've been thinking is essentially to create landingpages not for every single one of them but targeting the keyword "painter" and then larger cities. Based on volume and competition this is very attractive for us. I would have to create a page and write a description of the local painter and their services in some way. But the painters whom i would create landingpages for are very, very similar. So how would I go about creating this many pages without ending up having duplicate content and also just in general having that many landing pages targeting different places in my country - is it nuts? I would love to hear your thoughts on this.