No.
It's an 8th level slot (upcast to target 5), and a few hired NPCs before you the night before ylj leave town.
Now you are talking about 15th level characters (at least).
Also, I guess you missed the part
"at the DMs discretion" when it comes to NPCs participating in circle spells and that NPCs doing this need to use the "same or higher level" slots (so hire 7 more NPC casters of 15th level)
If you are 15th level, why not just buy scrolls of FOM?
Might as well toss Longstrider, Aid, Feather Fall, Blink, Death Ward, Regeneration, and Foresight while you at it. Possibly others non-concentration buffs I've missed. Then take a long rest and get all the slots back.
Yeah in a party with 8 casters .... a high level party for some of those.
Is that going to happen every day? No. But it will make a big difference on the days you can do it.
Like I said less of a difference than Lemund's Hut or a host of 1st level spells which will happen every day.
Which is a lot more efficient than casting it 4 times a day.
No it isn't. Haste is a weak spell compared to other 3rd level concentration spells you can cast
1x Haste for 8 hours is usually going to be less powerful than 1 Fear and 3 Tasha's Hideous Laughter and that is the trade you are making just in terms of spell slots, before you consider the limits on concentration and the likelihood you lose concentration before the 8 hours is up.
Haste for 8 hours is around 15 attacks, extra movement and an AC bonus ... if you hold concentration.
Let me know when 2 martials can use a crossbow together to shoot 1000', or if a group of them can spend 10 minutes training to get advantage on all attacks for the next 24 hours.
What do martials have to do with any of this?
We already have spells that can go a mile or more right out of the book unmodified, and multiple ways to get several more spells past 1000 feet and I have never seen any of them actually used at those ranges in 9 years of playing 5E. If this was such a big deal we would already see it and we don't.
Since you mentioned Martials though; any 13 level Fighter can get more attacks with advantage in a day than a caster with foresight on themself for 24 hours is going to, and he can do it a full 4 levels earlier, without anyone helping and without burning any resources. Heck, Martials with Vex are making about half of their attacks with advantage right at level 1! Do you need me to bring Barbarians into this discussion too?
Like I said - a big nothing!