Ah, the house of cards built upon an investment platform...
Frankly, relying on someone's paycheck in order to finance the purchase of an asset is more prudent than relying on an investment to generate an income stream to do the same. Assuming the investment is not something guaranteed, such as an immediate annuity, government bond, etc.
Markets of all countries involve people (fact). People are emotional (fact). Markets are volatile (fact). Why would you bet your dream home or your child's education, both very important goals, solely on investment performance?
Purchasing a home is not "purchasing a liability". If you truly understand the economic impact of a home purchase on your personal economy, you'd understand this to be entirely untrue.
In fact, these people are doing exactly what they should be doing. They are continuing to save all the meanwhile having the financing in place to secure their dream. Could this income stop? Yes. But disability insurance and other strategies can ensure things continue. Could someone pass away? Yes. But life insurance can ensure debt gets paid off and children go to college.
Which would you rather have, no guarantees in life, OR guarantees you can coordinate and integrate into an overall strategy to accomplish everything you desire. This "bet everything on investments to fund your dreams" approach is exactly what some stock brokers I know preach, and it is exactly the type of advice that ruins people financially. What happens when the investments don't work out? What happens when markets panic and you are withdrawing funds? What happens when you overestimate your ability to earn a certain return? What happens when you slip on icy concrete and cannot work for 6 months? What happens when an uninsured motorist with zero net worth runs a red light and kills the primary wage earner?
The only people that can invest their way out of some or all of these challenges are the uber-wealthy. Because if their investments tank 40% (don't say it cannot happen! because no one can predict the future), everything still works as planned (retirement, goals, business, etc). However, most students would not be happy if their college education fund tanked a year before college and they no longer could go to the school they had planned. Or what about the Winstons, who I met after both the tech bubble and their stockbroker's fees/commissions wiped out 80% of their retirement assets, 6 months away from retirement. Now he's working at Walmart (just kidding, he's actually consulting and doing just fine, but he's had some health problems recently).
"Hydroman"

, pay the subcontractors with the loan, if you can. It makes no sense to pay with cash and then dip into the loan when you need to. In fact, this may be dangerous if, for some reason, you cannot get money out of the loan. Continue to save (invest a portion of this money if you feel the need to). Make sure you have liquid savings (emergency funds), disability protection, and life insurance to ensure things go as planned.