It is in fact possible to do an entire Scrabble game without ever using bonus tile besides the mandatory one in the front.
I started of with in, then print, then printer (I borrowed GPR's idea)
The circled/boxed i and n in the middle are blanks, btw.
Here's an interesting note to point out: just because this set-up doesn't use any bonuses doesn't actually make it the lowest scoring game. I screwed up with using the k twice (in OAK and KEG). Even disaccounting for that, there are over thirty different reuses from just my initial count. I actually lost count... If anyone wants to waste their life, feel free to count it up, but regardless, it takes some obscure words and many different tile placement that ends up creating more points rather than just taking the double letter on the 1 point-er.
*Please note that no bingos were actually scored in this run.
**All words are valid words in Scrabble. Yes, "cwm" is a word. Yes, "joe" is a word. Yes, every single word here is a playable word. If you don't believe me, go ahead and look up every single word and waste your life
That one's just a joke boad that I made, by techinical rules of Scrabble, if no one challnges it, it's valid. Another way to make a board, without any use of the bonues tiles.
It's physically impossible to achieve 187, as the OP stated. In fact, it's impossible to get 188, 189, etc... you have to cross tiles. I think the only way to get the lowest possible score isn't to use the least number of bonus tiles. Rather, it's the least number of crossings: and those crossings need to be on a 1 tile for minimal effect on the points.