Thanks a lot for your answers, it helps a lot man. I think we are a few people here who read for motivation and for SEO help!
What you say is that "soft towels" can be included in two the cheap-towels category and pool towels category, but later u say you don't include the same content (I assume post/article) in 2 different categories? What is different, for example is soft towels or pool towels differnet from cheap-towels?
Are you sure that the structure, for example: "CheapTowels.com/towels/cheap-towels/" isn't bad? when the main keyword is repeated in the url, then in category and then in the url for the specific post? I heard that we should never repeat the same keyword or word twice..
Would you do it in a differnt way?
And three other questions, I am sorry mate if I annoy you, u can tell me then I will not ask so much

..but, do you only go for SILO structure if your site is bigger than X amount of posts? Like 50? Or 100? Is it worth to do SILO on a small site? <50 post or less?
I've seen sites rank without silo and on their homepage they got a statistic page. Do you recomend having a statistic page with price chart comparsion or a table or whatever on the homepage?
You said you use h2 and h3 tags etc, do you have more than 1 h2 and h3 tags? if you do, how many are you comfortable of having before making your site just look like a normal affiliate site without any value..if you understand me.