More unproven systems will, IMO, result in more wasted time and money.
We could most likely use the current type of rockets and technology and get a small colony on the moon in under 5 years.
IF we were serious about it.
These are private industry programs as far as I know and if NASA contributes anything it's seed money. These kinds of technologies need to be explored or we're just going to be driving around in the space version of the Model T for the next few hundred years.