Higher plans include more server resources (#1 factor in the WordPress optimization guide). Here’s the full comparison chart, but GrowBig gives you about 2x more server resources than StartUp, and GoGeek is semi-dedicated hosting which gives you even more. GrowBig and up comes with a free migration, staging, advanced caching, and ability to host multiple websites. GoGeek comes with priority support. Their cloud hosting is quite the price jump at $80/month.
2. Of course, nearly all my readers are using WP so I’m biased. But even so, most successful affiliates use WordPress. There are less restrictions in terms of hosting (site speed), design customizations, plugins, cloaking affiliate links, lots of things. I would setup a free wordpress.com site just so you can play with the dashboard and see how you like it. Who knows, you might find a theme you really like (eg. StudioPress) and want to make the transition. I would at least test it out…it’s better to make the transition earlier than later.
Affiliate Disclaimer – if you sign up for SiteGround with my affiliate link I will donate a good chunk at no expense to you. Each year I donate $3k to GoFundMe campaigns (2018 was to feed the hungry in Denver, 2017 was to Red Cross at Hurricane Harvey). Your support helps and I genuinely appreciate it. I try to make my reviews unbiased and backed by evidence in the form of Facebook polls, tweets, and real conversations. If you don’t want to use it, here’s a non-affiliate link to SiteGround. Either way I truly believe they are a stellar WordPress host and your site will run faster/smoother… do your research on Facebook groups + Twitter and you’ll find most people say the same.
It is important to realize that it is possible to earn an income with affiliate marketing, but it not easy to earn an income with affiliate marketing. It will take hard work and dedication to build a lucrative affiliate marketing website. You will need time to build your audience and gain their trust before you are able to perfect your affiliate marketing strategy.