I am on H1B status in US with a IT Consulting firm, I have an opportunity to work in Brazil on a 2 year contract. The contract for this opportunity will be between my H1B employer and the end client is a company in Brazil. I intent to work in Brazil for 6 weeks continuous followed by 1 weak remote work from home in US and this repeats for the entire duration of 2 year contract.

1) Can I maintain my H1B in the above scenario?
2) If I can maintain my H1B do you see any potential problems in getting a H1B stamp on my visa and any issues at port of entry every time I enter US after 6 weeks of work in brazil to work from home in US?
3) If h1b is ruled out then what other visa options do I have to come back to US for a short stay to visit friends (Kindly note my I-140 has been filed)