CRM for PV/EnergyTec Sales

Hey everyone,

I'm looking for a fitting CRM as I freelance for an engineering office. I'm looking to get in touch with building companies and photovoltaic companies and I'm selling the service of planning and consulting.

Later on, it is possible for me to also sell actual PV power plants or heat pumps, technology.

I work with two senior engineers and I am taking the sales part.

So I tried Hubspot and use the free version. But I miss the feature of creating detailed offers and bills. I do not need all the other features necessarily, and that is why i am hesitant to buy the Abonnement.

Are there alternatives for my purpose? Are there crms, which offer the features but can be operated for 10 to 20 eur/month? Or I would also be interested to make a one time purchase.

Tha ks in advance!