A two-van shop does not need every module a 40-tech company runs. If what you really need is to bill the repair, collect for the tune-up and keep agreements current, look for HVAC invoicing software that handles those three well. KadePay focuses on that: bills by text or email, card and bank payments, and recurring billing for plan members.
An HVAC service agreement is the steadiest money in the trade, but only if it is billed on time. On Team or Pro you can charge a monthly comfort plan, or a yearly furnace tune-up and AC check, to the method the customer authorized, and every charge shows up in one list of transactions. A signed agreement form spells out the visits included and how the customer cancels.
Replacement season is where HVAC financing for customers matters. A $9,500 heat pump is easier to approve when it can be split into agreed installments from a saved method, or when the customer can apply for Affirm at checkout where eligible. For the AC repair invoice on a hot afternoon, take credit cards in the field with Tap to Pay on a compatible phone and keep moving to the next call.