A broken torsion spring means the car is inside the garage and not coming out, which gives this category pricing power almost nothing else on the list can match. Here is what a garage door business costs, what it pays after you replace yourself, and why $15,000 and no state license makes it the most open entry of any trade among the fifty.

A truck, a set of tools and about $2,000 puts this near the bottom of the entry ladder in the fifty, and the work starts producing cash quickly. Here is what a handyman business costs, what it pays after you replace yourself, and why the order you do things in matters more here than in any other category on the list.

At $347.5 billion, electrical is the largest trade market among the fifty — nearly double plumbing — and employment is growing 9% a decade with 81,000 openings a year nobody can fill. Here is what an electrical contracting business costs, what it pays after you replace yourself, and why where the revenue comes from decides more than how much of it there is.

Estate sale firms take 30 to 40% of every sale, and the aging-boomer wave behind them is the largest transfer of household goods in American history. Here is what an estate sale business costs, what it pays after you replace yourself, and how a referral network turns a calendar of scattered sales into a predictable one.

More than 1.2 million cleaning businesses share a $110 billion market, almost all of them small and owner-run, which makes this one of the most fragmented industries in the country. Here is what a cleaning business costs, what it pays after you replace yourself, and why it is the one category on the list where all three ways in genuinely work.

Mobile trainers charge $60 to $100 an hour and carry almost no variable cost, which gives this category some of the strongest solo cash flow on the list. Here is what a mobile dog training business costs, what it pays after you replace yourself, and the one decision — stay solo or build a team — that settles almost everything else.

Lint buildup is a leading cause of house fires, and most homeowners have never been told, which makes this one of the few services that sells itself the moment someone explains it. Here is what a dryer vent cleaning business costs, what it pays after you replace yourself, and why attaching it to a service already inside the home turns an expensive sale into a nearly free one.

As new-appliance prices climb, more households choose the repair, which puts a steady tailwind under this category. Here is what an appliance repair business costs, what it pays after you replace yourself, and why the manufacturer authorizations most operators skip are the thing that fills a schedule without marketing.

Around 93,100 independent shops share a $92 billion market and no national chain owns it, which leaves the field open to a well-run local operator. Here is what an auto repair business costs, what it pays after you replace yourself, and why one decision made before you sign — which shop, at which price, with which specialty — settles almost everything that follows.

More than 10,000 Americans turn 65 every day and nearly all of them want to stay in their own homes, which gives this category the strongest demographic tailwind on the list. Here is what an aging-in-place home modification business costs, what it pays after you replace yourself, and how the referral network that makes it demanding becomes the thing competitors cannot buy.