Some true-estate traders wanting for the future big detail are turning to compact businesses. A new breed of home companies is acquiring up properties occupied by gas stations, doctors’ workplaces and corner grocery merchants. They see an opening due to the fact major asset administrators generally avoid these homes, which they take into account risky. Withco, a New York-primarily based landlord that indicators hire-to-individual discounts with smaller firms, lately lifted $30 million in venture funding from backers like Founders Fund, Canaan Partners, Lennar Corp. , actor Will Smith and athletes Venus Williams and Kevin Durant. Keyway, also of New York, buys medical-workplace structures from compact firms and then leases them…