Personal loans don't go over 10 years maximum.
Also you'd need to go for the mortgage first get the property then let the dust settle for 12-18 months before shooting for a personal loan.
No bank is going to sign off on the application for a mortgage and a personal loan at the same time unless your credit score is impeccable and you have a solid borrowing history.
I think your underestimating how strict the banks are at lending in the current climate, I got my mortgage 12 months ago and that took a good 2 months of paperwork and picking through my finances with a fine tooth comb, employment checks etc. They'll go over everything.
if you think your just going to be able to walk in as a fist home owner and get a mortgage and a personal loan etc easily, think again.
These days mortgage's aren't like car loans, you can't just walk into a branch shake someones hand and have some money, it's a long painful slog to get all the paperwork and clearances done.
Also don't forget depending on where you live you'll need around 20% as a deposit up front plus stamp duty etc so you could potentially need say $200k in the bank just to qualify for the loan.
Also remember that your bank gets an assessor out to value the property before you get a mortgage (this is mandatory as the bank won't lend you more than the property is worth), so if you want a mortgage to buy a $400,000 property that needs a lot of work the bank won't approve you. For example if the property is listed at 400k in the current market and it needs $120k worth of work to make it livable, the mortgage won't get approved.
To put it short you can't get a $400k mortgage on a house thats only worth $200k, the bank needs to know that if you can't pay your mortgage they can flip it and cover the costs.
This is what people tend to forget with "fixer uppers" is that the bank will only loan you what the property is worth, if the property gets assessed as being worth fk all then they'll only lend you fk all. Which makes it very hard at the moment as even houses that are a wreck are listed for well above their value.