Like the idea of a tarp in rainy summer weather, just have never used one before. I would be ground sleeping, not hammock. I currently use a Henry shires rainbow tarptent which is great, but can get very moist/ stuffy in weather. Several questions for you fine folks.

What is a very cheap practice option? Maybe plastic sheeting or shower curtain and Walmart twine?

resonable size for 1 person ( 5'6" ) and lg dog.

How do you keep the lines from getting all in a tangle?

If I like this option, what tarp to get? Cuban fiber is so light but pricy, am considering ray jardine kit with beak and batwing option. Would like something in a moss green or cameo to stealth camp and be less visually intrusive to others.

Other questions i should be asking? Thanks in advance for your input.