Many brokers start by working part time and they transition over to full time as they get busier. 1 loan a week isn't a full time job, 1 loan a day is very busy.
Here's the harsh reality of starting a mortgage broking business...
If you want to replace an income of $50k, you probably need to generate at least $80k per year to cover business costs (and this would be running with minimal overheads).
Then consider that you loose about 20% of your income to an aggregation, so $80k becomes more like $100k.
Now we put this in terms of commissions. In the first year many lenders don't pay trail commissions, so we can simply ignore this and rely sole on upfront commission which is about 0.6% of the loan amount in most cases.
$100k / 0.6% = $16.67M
To replace a $50k income in the first year or two, you need to write about $1.4M per month. Average loan size is about $300k - $400k. Hence you need to write about 1 loan per week to replace a $50k income.
For an experienced broker with good networks in place this is fairly easy. For a new broker still finding their way, it can be harder than it sounds.
But wait, there's more
...
It takes about 3-4 months to get paid! You usually get paid about 6 weeks after the actual settlement. Since most settlements are about 45 or 60 days, it can be a long time between doing the work and collecting the money.
I've been there myself and I've mentored a number of brokers through their first few years. There are a few who manage to earn a good income in the first 12 months, but they're extremely rare. A few will break even.
About 80% of brokers fail and leave the industry within the first 2 years. I've heard that up to 80% of the remaining brokers quit in years 2-4. I've seen this across large groups and small individual businesses.
There's a lot of different factors which can contribute to becoming a successful and profitable broker. I'd say the one key thing common amongst all successful brokers is the right people helping behind the scenes and the simple will power not to give up.