Costa Rica Business Legality & Tax Advisor

UPDATE: I need this advice from a reputable HR, employment, immigration and legal/tax adviser. It should be provided as a pdf on headed paper and signed. I need urgent assistance with understanding the legality and tax implications of working in Costa Rica while there as a tourist... (Budget: £20 - £250 GBP, Jobs: Business Analysis, Business Consulting, Business Development, Corporate Law, Legal, Legal Consultation, Tax, Tax Compliance, Tax Management Consulting, Tax Risk Management)