I am new in this forum. What mining equipment would you suggest. I have about 3500$ to invest.
It isn't worth if you're talking about bitcoin as the prices go down atm and difficulty goes up anyway.
On the other hand you may try mining altcoins but it's always an gamble.
The market price of mining equipment might go down though, because of the drop in price of Bitcoins and altcoins. So it might not be a bad time to start if buying with fiat.
Then again, simply buying the coins would make more sense.