Can't put it any better than what @Colby Hager has said.
I'll also add that if you're concerned about inspection costs, find out what they are before you move forward. Keep in mind though, the inspection is going to be a constant among all of your deals. It's best if you decide that a deal is worth pursuing before putting any money into it. Also, be aware that there will very likely be a time when you inspect a house and something comes up in the inspection that makes the deal not worth getting. You'll be out the money for the inspection, but will have saved yourself from a greater loss.
One other thing worth mentioning is that there are no hard and fast rules for wholesaling, it's not regulated. At least, it's not in my area, I get the vibe that's the case in most other places as well. You're free to try and work out whatever terms you want with the wholesaler. There's no harm in asking the wholesaler if you can send an inspector in before you give an offer...they might not go for it, but you never know, it always depends on their situation. If less people are interested in their property, then they'll be more likely to grant you certain requests.
Again, bringing up the example of the house that I'm closing on tomorrow. I had initial contact with them, told them I was interested and asked to see the house. Wholesalers give showing preferences to buyers who offer first, but in this case, they were fine with me walking the property because it's vacant. After walking the house, I gave the wholesaler my offer contingent on the inspection results of one potential problem area. In this case, the wholesaler was fine with that. What's more, they want to close quickly and told me that I could get my inspection done ASAP. I was able to get my inspector in the house before I had even signed to take over the purchase agreement.
Focus on what you need to make the deal work for you and be sure in your numbers.