Of the $20k, let's assume $5k is the hardware. Now $15k is the work. Let's consider the installation a highly skilled job, commanding $100/hour. This is 150 hours, or a tad more than 6 business days for a team of 3, working with full load 8 hours a day.
Does a split system indeed take so much work? What is so effort-intensive?
2-3 hours planning, parts list, client management,
4-6 hrs to run electrical,
2-4 hrs to mount condenser,
4-8 hrs for medium line set,
4-8 hrs air handler, duct, platform integration,
1-2 hrs with thermostat and condensate protection,
1-2 hours nitrogen testing and pull vacuum,
1 hr documenting photos for incentive programs,
1 hr spending time educating customer about the system.
Messing up a parts order and figuring out a solution 4 hrs too often.
Total: 28 hrs, or 2-3 days of 2 people depending on the travel from their shop to customers home. I agree. Let's get that down to 12-16 hrs or single day and the best shops and installers can do that.
CA Labor law allow about 6-7 hrs of work on site as installers often have to start at their shop.
$3-4k of labor cost for small-mid size. Best might be be 2-3K labor cost. Minor equipment 1-2K, permit and testing required $1K. Then 50% gross margin is the target, net costs $2.5K indirect labor, $2K sales cost, project management, trucks, insurance, software, 10-20% net margin.
Does a split system indeed take so much work? What is so effort-intensive?