Google is getting VERY good at catching spun content so you'd better be talented at manual spins. If they DO catch you, of course they'll spank you... and hard. So anything you use spun content on is inherently AT RISK. Worse yet... Google gets better at finding spun/poor content every year. So in the longrun you're screwed. I'd weight your other options and see if you couldn't find a cheaper source for manually hand written content.

I’m new on this of online business thing, and English is not my native language. In spite of that, I have written my first pages and posts by myself. I totally agree with what you say here. There is nothing more satisfactory than to produce your own content, even if it is not perfect or excellent in the beginning, but with time and practice, it will surely improve.
By now, most people in the SEO industry are more than familiar with the various animal named updates that have made it nearly impossible to rank without high-quality content. One of the most famous ones is Google Panda, which directly targets on-site content quality and severely penalizes sites that have spelling and stylistic errors or were not edited well.
2. Show Off Your Singularity - In my previous posts, I have discussed the value of being distinct from others in your business. You must promote your singularity. What's it about YOU that will bring your audience for you? Among the greatest mistakes you can make is attempting to duplicate someone in your business. Although, they may become successful, you're not giving your target audience reasons to pick your services over theirs. That is why it is essential to reveal your audience why you're distinct, and be consistent with your singularity.
A website with lots of unique and human-readable content is going to give you the best ROI. The more quality readable content your website has, the more exposure it will get from major search engines such as Google & Yahoo. But creating unique content takes time as you first need to develop content creation strategies and then you need some hours to write a full SEO optimized content. How great it would be if you can produce quality content within minutes! Yes, it's possible with the help of this free Article Rewriter Tool developed by SeoToolStation.