If you had say 2 or 3 vans with operators, going out there every day (getting lots of calls because you are maga cheap, compared to solo operators) doing the actual graft for you, and after they are paid and ALL expenses taken off you make £25 per van per day clear profit. That's £75.. per day, or £375.. per 5 day week. Not a bad extra income.
However using the same cheap priced tacticts as a sole trader, one man band like most of us are, with just the one van, your income would be 1/3rd of that = £125.. per week profit.
If these rough profit figures are on the low side, even if they were trebled, with both examples working flat out.The cheap multi unit operator would be making over £1,000.. per week while the one man operator would be making only £375.. and doing all the work.
That's why 'cheap' can work well for multi units but not so good for solo's.
Obviously there's more to it than just that, but it is generaly true.
Dave.