Unless you're intent on ripping up your fairways, this may be a cheaper option, can be spread out over time, and allows the course to remain open.
I recall an interview with Matt Shaffer (it's on youtube) where he spoke about what they did at Merion in the years before the US Open.
They topdressed the hell out of the fairways.
If I recall correctly:
...it was regular light topdressings.
He did not core fairways as he did not want to bring up the weed seed or poa. The line that sticks out from the interview is "we basically buried the stuff" (weed and poa).
In the interview he reveals how many tons of sand they were applying per year. I can't recall the number.
Friends who are supers tell me, once you start down the road of topdressing fairways, you have to continue. It makes no sense to make a couple applications, and then stop. And, a huge application of sand to your fairways wasn't recommended either. Light and constant was the way to go.
Would like to hear from others on this.
One other funny bit (likely from another interview) with Matt Shaffer is what he did to the greens to get them rock hard. A consultant (USGA?) swung by and asked him what he was applying to the greens. He replied, "oh minerals". One of his staff working in the vicinity started chuckling. He was basically dusting the greens with concrete dust. The consultant said... OK... but once the event is over, you have to break this stuff up immediately. I suggest you find and watch the video to ensure my recollection is accurate.