Hello,
I hope you're doing great. My name is Nikhil Sharma and I'm a CRM consultant. I have over 7 years of experience in deploying CRM solutions. From what I understand, you need a very basic CRM for storing customer data. We can use SugarCRM or suiteCRM for the same. They're both open source, so there will be no recurring costs and they are modular and extensible, which means if in future you want to add something to them, maybe a business specific functionality, you can do so with the help of a custom module or plugin.
If you already have a hosting account then I can setup the CRM there, else we can get a VPS for $5 from DigitalOcean. If you want any customizations in the CRM let me know and it will be immensely helpful if I can get some idea about your business. This way I can suggest more ways in which you can use the CRM. There are a lot of things a CRM can do apart from customer data storage, but I guess we can talk about them if you need the functionality. Right now, I will only concentrate on the basic modules: Leads, Accounts, Contacts and Opportunities. If you want a more simplified version or a version with more features, I can do that too.
If you have any questions / queries for me, please free to ask. Let me know if we can take this forward.
Thanks and Regards,
Nikhil Sharma